A theoretical model for striped patterns in nematic hydrogels  

作　　者：WU Zhen ZHONG Zheng 

机构地区：[1]School of Aerospace Engineering and Applied Mechanics, Tongji University, Shanghai 200092, China

出　　处：《Chinese Science Bulletin》2011年第17期1778-1781,共4页

基　　金：supported by the National Natural Science Foundation of China (10872150,11090334);Shanghai Leading Academic Discipline Project (B302)

摘　　要：Both nematic elastomers and nematic hydrogels are known to display striped patterns.In contrast to a large body of proposed models for nematic elastomers,few studies exist to interpret striping in nematic hydrogels.In this paper,a theoretical model based on free energyminimization is developed to simulate the drying-induced striping in a layer of nematic hydrogel bonded to a rigid substrate.The liquid crystalline polymers in the nematic hydrogel rotate by certain angles to form the striping in response to a drying environment.Moreover,the striping occurs only for a finite range of humidity,and the boundaries of this range can be tuned.Both nematic elastomers and nematic hydrogels are known to display striped patterns. In contrast to a large body of proposed models for nematic elastomers, few studies exist to interpret striping in nematic hydrogels. In this paper, a theoretical model based on free energy minimization is developed to simulate the drying-induced striping in a layer of nematic hydrogel bonded to a rigid substrate. The liquid crystalline polymers in the nematic hydrogel rotate by certain angles to form the striping in response to a drying environment. Moreover, the striping occurs only for a finite range of humidity, and the boundaries of this range can be tuned.

关 键 词：向列型 水凝胶 模型 条纹 图案 液晶聚合物 刚性基板 弹性体 

分 类 号：O753.2[理学—晶体学] O648.17